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[ GLSA 201406-03 ] Fail2ban: Multiple vulnerabilities
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PostPosted: Sun Jun 01, 2014 5:26 pm    Post subject: [ GLSA 201406-03 ] Fail2ban: Multiple vulnerabilities Reply with quote

Gentoo Linux Security Advisory

Title: Fail2ban: Multiple vulnerabilities (GLSA 201406-03)
Severity: normal
Exploitable: remote
Date: June 01, 2014
Bug(s): #364883, #473118, #499802
ID: 201406-03

Synopsis

Multiple vulnerabilities have been found in Fail2ban, the worst of
which allows remote attackers to cause a Denial of Service condition.


Background

Fail2ban is a tool for parsing log files and banning IP addresses which
show suspicious behavior.


Affected Packages

Package: net-analyzer/fail2ban
Vulnerable: < 0.8.12
Unaffected: >= 0.8.12
Architectures: All supported architectures


Description

Multiple vulnerabilities have been discovered in Fail2ban. Please review
the CVE identifiers referenced below for details.


Impact

A remote attacker could send a crafted URL to a web site which, when
parsed by Fail2ban, would deny a specific IP address. Also, errors in
regular expressions within certain filters can cause arbitrary IP
addresses to be banned. Furthermore, a local attacker could perform
symlink attacks to overwrite arbitrary files with the privileges of the
user running the application.


Workaround

There is no known workaround at this time.

Resolution

All Fail2ban users should upgrade to the latest version:
Code:
# emerge --sync
      # emerge --ask --oneshot --verbose ">=net-analyzer/fail2ban-0.8.12
   


References

CVE-2009-5023
CVE-2013-2178
CVE-2013-7176
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